Video Transcoding for Wireless Video

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Video Transcoding for Wireless Video

• Wireless Device Has Limited Resources
• Processing power
• Memory
• Display capability
• Change GOP Structure
• Save memory
• Reduce decoding complexity
• Frame Size Down-sampling
• Large bit rate reduction
• Fit display screens of most
• mobile devices
• MPEG1/2 to MPEG4

720 x 480
360 x 240
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Video Transcoding Techniques

• Previous Solution Shanableh Ghanbari, 00
• Proposed Solution

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Down-scale Decoder

• Save More Than 50 of Memory
• Reduce Computational Complexity by 70

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Experimental Results

• Average PSNR Degradation is 0.34dB at 384 kb/s

S. Liu, and A. C. Bovik, A Fast and Memory
Efficient Video Transcoder for Low Bit Rate
Wireless Communications , ICASSP 2002, accepted.
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